Howard ashley pedbick



H, A. PEDRECK CALKING MACHINE Filed Dec, 22, 1923 Patented .lune ll, i927,

Uitl't TAE,

HOV/'ARD ASHLEY PEDRICK, OF BALA, PENNSYLVANIA, ASSIGNOR T0 EAV-AIR-TIGHT CALKING- CO., OF PHILADELPHIA, ENNSYLVANA, A CORPORATION OF DELA- WARE.

CALKING MACHINE.

Application filed December tinuation in part of my copending applica.

tion, Serial No. 612,108, filed Jan. ll, 1923.

One object of my invention is to provide a relatively small, and easily operated gun for containing the calking material, and from which it may be forcibly discharged under the influence of a suitable fluid under pressure.

A further object of my inventionis to provide a structure adapted to utilize coinjn'essed. air for the expulsion of the contained calking material, and so constructed as to insure the complete or substantially complete delivery of each charge, as well as to facilitate recharging; the parts being conveniently arranged to permit .rapid refilling and closure.

A further object of my invention is to provide a novel form of container substantially spherical in shape, having a flexible diaphragm disposed within the same and dividing the interior into a pair of chambers whose dimensions will varydepending j upon the position of the diaphragm; one

chamber receiving the body of calking material to be subsequently discharged and the other chamber receiving fiuid under pressure to act upon such diaphragm and effect discharge of such calking material.

A. further object of my invention is to provide means for preventing injury to or destruction ofl the flexible diaphragm after it has effected displacementof the calking material and before the supply of air pressure has been cut off, andl a still further ob` ject of my invention is to provide the central portion of said diaphragm with a metal guard to prevent its entrance into the discharge or outlet passage by the action of the fluid pressure medium after the plastic calking material has been displaced; thereby avoiding injury to or destruction of the diaphragm.

l attain these objects and other advantageous ends, all of which are more fully set forth hereinafter, by the mechanism illus- 1923, Serial No. 682,174, and in Canada February 12, 1923.

trated in the accompanying drawings, in which:

Figure 1, is a perspective view of a calking gun embodying my invention.

Fig. 2, is a'sectional elevation on the line H-ll, Fig.- l. Y

Fig. 3, is a cross sectional view on the line III-dll, Fig. 2, looking in the direction oi the arrows.

Figs. fl and 5, are detached sectional views illustrating modified details of construction vwithin the scope of my invention, and f Figs. 6, 7 and 8, are sectional views of the pressure controlling valve which I may employ.

ln the drawings herewith, the body of my improved calking gun is shown as made up of a pair of cup-shaped, substantially heini-spherical shells, l and l, having meetmg flanges 2 and 2, secured together by screw bolts 3, and nuts 4l. A flexible diaphragm 5 is disposed within the chamber formed by said shells, and this diaphragm may be secured between the flanges 2 and 21. In the preferred embodiment ofl my invention, this diaphragm is 4of' resilient material such as sheet rubber, and with its marginal edge clamped between the fianges 2 and 2, a fluid tight joint is provided. The diaphragm may be slightly greater in extent than the cross sectional area of the internal chamber so that normally it lies within the same, clear of the Walls, as illustrated in Fig. l.

This diaphragm serves to. divide the interior of the chamber formed by the shells l and la, into a pair of compartments 6 and 7 g the larger one 7, as defined by the inner wall of the shell la and the diaphragm when the latter is in the position shown by full lines, Figfl, serving to receive calking material which is subsequently ejected from the device through a discharge outlet 8, to which a nozzle 9, may be attached, whilethe other chamber, indicated at 6, is in communication with a source of fluid under pressure, compressed air for instance, which may act upon the diaphragm and cause it to expand against the body of calking material in the chamber 7 and force it therefrom.

For convenience, the shell l will be referred to as the head of the device, and this head is provided with a suitable inlet passage l() for the introduction of' fluid under pres- `-tubular shell 13, having a post 141 at one end,

whereby it may be secured to said head; said post having an end 1liEL in threaded engagement with a boss 12LL carried by theshell 1. As a convenient means of securing the oppo- :site vend of the handle in place, the pipe 11 conveying thev fluid pressure may pass throu h the shell of the handle and be in threa eti-engagement with the latter.

The `pipe 11 is provided with a valve 15 ofy the three-way type, whose plug 16 may be provided with a through passage 17which may-be? placed in communication with the inlet passage and the air supply pipe 11, as shown in Fig. 6, and with a passage 17 Vwhereby they chamber 6 may be placed in' communication with anl exhaust port 18 in tl1e-.valveI shell, as shown 1n Fig. 7, at will.

.-Wth such an arrangement, air under pres-- sure may be delivered to the chamber 6 from rSaid conduit 11, or exhausted rfrom the chainber 6, as lmay be desired. Additionally, the vnexhaust port 18 may befemployed for an-` y; other important function, lto wit, by placing the supply pipe 11 leading from the source of pressure in communication with such port 18, asindicated in Fig. 8, Huid pressure dis- Ycharged therefrom, air for instance, may be `employed to cleanse from the crack or joint f to be callied, any collected dust, dirt or chips,

,that would interfere with its proper calliing. l-.In the sectional views Figs. 6, 7 and 8, the

source of -pressure enters the pipe 11 from the right, passes through the valve to the extension of pipe 11 and enters the chamber 6 via` the. inlet 10,; Fig. 6,. showing the position ofthe valve when air pressure is dischargmg into ,said chamber 6; Fig. 7, showing the.

position of the 'valve when air pressure in V`the chamber 6 is passing to exhaust, and

- Fig. 8, showing the position of the valve when the air pressure is employed for the purpose of cleaning dust and dirt from the lcracks orcranmes to be callred.

The shell 1r has an opening 2() through `.which Ycallzing material may be introduced into the chamber 7 of the structure; normally closed by a cap 21 threaded vtherein.

This cap; has the relatively small outlet S for the material to be ejected, and such cap may be flanged to extend over the end of the wall surrounding said opening 20. In practice, it is desirable that the stiiucture. shall be as f ylight asV possible, and to that end, the shell may be made of aluminum. As there is a `tendency of this material to stretch, the wall of the opening 2O is preferably provided with -a-;band 22 of spring steel or other suitable material, to reinforce the same.

lt has been found m practice that a plain signed to bridge the outlet opening 8 and prevent said diaphragm being forced therein. This guard may be in the form of a pair of plates so formed and of suchdimensions as to constitute a rigid support for the central portion of the diaphragm that is brought adjacent to the entrance of the outlet 8 under the action of the fluid pressure, so as to efl'ectually prevent said diaphragm being forced into said opening or being abnormally stressed or ruptured by the action of the airtending to force it therein.` These plates may be substantially flat, or they may be concave-convex and disposed in either of the positions illustrated in the drawings. in accordance with this feature of my invention, the central part of the diaphragm 11 carries reinforcing elements in the form of plates 25 and 25u applied to the opposite faces of the same, and rigidly clamped thereto by suitable fastening means, which may be in the form of a screw bolt 27 and nut 28.

When the chamber 7 is empty and the valve 15 is in position to exhaust the air from the chamber 6, the diaphragm tends to assume the position shown by full lines, Fig. 2, so that when the cap closure 21 is detached,` calking material may be intro` duced into said chamber 7; substantiallyr filling the same, after which the cap closure 2l may be secured in place. Upon proper operation of the valve 15, air under pressure will be delivered to the chamber 6, and acting upon the diaphragm will cause it to eX-,

pand andv compress the body of material` liu the Achamber 7 of the section 1u; causing this material to be discharged through the outlet 8,'and through the nozzle or delivery tube 9, when` the latter is employed.` As the diaphragm will be distended by the pressure and caused to follow the contour of the wall of the section 1, all or substantially all of the material within the chamber 7 and adhering to said wall will be forced out.

The rate of delivery of the material may be regulated by the position of the -valve 15 and when the plasticmaterial has beendischarged from the chamber lT,.the diaphragm will assume the position shown by broken vlines in Fig. 2, with. the reinforcing plates seated over the entrance to the outlet opening 8; preventing further movement of the diaphragm and avoiding all danger of the fluid pressure puncturing the same by blowing a portion into said outlet passage. After the pressure has been cutoff and the valve turned to the position indicated in Fig. 7, to exhaust the air from the: chamber 6, the diaphragm will tend to return to the an inlet for fluid under pressure and forming a head for said casing and the other having an outlet passage, a discharge nozzle connected to saidflatter section in line with said outletl passage, a reinforced flexible diaphrgam disposed within the chamber of said casing and confined between the sections of the same, and means for controlling the flow of fluid pressure to the chamber defined by the Wall ofsaid head land the diaphragm for causing the latter to act upon and expel material from the casing through the discharge nozzle. 2. ln a callring device, the combination of a spherical casing having an inlet passage and an outlet passage, a centrally reinforced rubber diaphragm dividing 4said casing into a pair of chambers; one of said chambers having the inlet passage and being in communication with a source of. fluid under pressure, and the other chamber having the outlet passage and receiving a lbody of viscous calking material to be subsequently delivered therefrom, a discharge nozzle connected to said casing in line with said outlet passage, and means for controlling the inlet of said fluid pressure vwhereby it may act upon said diaphragm and cause the latter to expand and expel the material from said second chamber through said discharge nozzle.

3. In a calking device, the combination of a spherical casing comprising a pair of Vflanged sections detachably connected together, one of said sections having an inlet passage and the other section having an outlet passage, a discharge nozzle carried by said section in line with said outlet passage, a centrally reinforced rubber diaphragm internally disposed; said diaphragm having its edge confined between said flanged sections and dividing said casing into a pair'of chambers and the chamber having the outlet passage receiving a body of viscous calking material to be subsequently delivered through said discharge nozzle, a cover plate therefor in which the outlet passage is formed and to which said discharge nozzle is connected; the chamber having the inlet passage being in communication with a source .of fluid under pressure, and means for controlling the inlet of said fluid pressure whereby it may act upon said diaphragm and cause it to expand and expel the material from the other chamber through said dischargev nozzle.

Zl. In a calking device, the combination of a spherical casing made in separable .scctions and having an inlet passage and an outlet pas-sage, a discharge nozzle secured in said outlet passage, a reinforced rubber diaphragm internally disposed and divi-ding said casing into a pair of chambers; one of said chambers having the inlet passage and the other chamber having the outlet passage, a detachable cover member for the section of said casing in which said outlet passage is formed, a reinforcing band for the casing wall having the opening receiving said cover member; the chamber having the inlet passage being in communication with a source of fluid under pressure, and means for controlling the inlet of said fluid pres- .sure whereby it may act upon said diaphragm and cause it to expand andexpel the material from the other chamber through said discharge nozzle.

5. In a calking device, the combination of a spherical casing made in separable sec# tions and having an inlet passage for fluid pressure and an outlet passage for callring material, a discharge nozzle secured in said outlet passage, a reinforced rubber diaphragm internally disposed between saidsections and dividing said casing into a pair of chambers; one of said chambers having the inlet passage and the other chamber having the outlet passage, a detachable cover member for the casing in which said outlet passage is formed; said cover member closing an opening through which calking material may be introduced and said diaphragm lying normally out of contact with the walls of said casing; the chamberhaving the inlet passage being in communication with 'a source of iiuid under pressure, and means for controlling the inlet of said fluid pressure whereby it may act upon said diaphragm and cause it to expand and expel the material from the other chamber through said discharge nozzle.

6. A calling device comprising a hollow body, a flexible diaphragm mounted within said body and dividing the interior thereof in two chambers; one of which chambers receives calking material and is provided with an outlet opening, a source of fluid pressure communicating with the other chamber, and rigid reinforcing means for said diaphragm; said reinforcing means being positioned to prevent. the diaphragm being forced into the outlet opening by the action of the fluid pressure.

7. A calking -device comprising a hollow body formed of two hemi-spherical sections detachably secured together, a flexible diaphragm clamped between said sections and dividing the body into two independent` nected to a source of air under pressure,

and a reinforcing plate secured to the cen-` tral portion of the diaphragm in position to seat over the outlet opening when the v, diaphragm has been moved toward the same platescentrally clamped to opposite faces of..

by the Vact-ion of the fluid pressure.

8. Ay calking device comprising a pair of `hollow flanged sections heini-spherical in shape, a flexible diaphragm clamped lee-- tween the flanges of said sections; one of vsaid sectionsihaving an outlet opening and the. otherl section having an inlet opening with an air supply conduit connected there` to,` and a pairV of vconcavo-convex metal the diaphragm in position to seat over the outlet opening when; the diaphragm has been movedy toward the latter by the faction having an 4outlet opening and the other `of said sectionshaving an inlet opening; a

of the fluid pressure.

9. In a callring device, thecombination of a casingcomprising a pair of sections of substantially tlie'same -size dctachably coniiected together; one of said sect-ions having an outlet passage and the other section hav-, ing an yinlet for fluid under pressure, a dis-` charge nozzle secured in said outlet passage,

a reinforced flexible diaphragm disposed within the chamber of said casing and confined lbetween the sections ofthe saine and limited in such-area as to lie in its normal positionclear of' the walls of the chaniber, and means for controlling the flow of fluid pressure to act. upon said diaphragm andl cause the'latter to expel material fromA the casing through said .discharge nozzle.

`10. In a callring device, the combination of a casing comprising a pair of sections of substantially the same size detachably con- `nected together,4 one of said sections yhav- Vfor thecasing wallihaving the outlet pas-1 sage, andineans for controlling the flowof :fluid pressure tothe casing for causing the same to act upon the diaphragm and expel Y material from the casing.

a into two chambers, of which one has an out-' 11. A callring device .consisting of a hollow body; a flexible diaphragm mountedin said body to divide the interior thereof let opening; a source of lHuid under presL sure connected to the iother chamber; and ay rigid reinforcing device for the diaphragm `positioned to prevent its being forced into theoutlet opeiiingby the action of the air under pressure.

12. Acalking device consisting of aholylowbody formed with two sections; a flex-Y.

ible diaphragm clamped between said secwithin the tions and dividingthe ybody linto two cham bers ;a nozzle having an outlet opening from one of said chambers; a source vof air under' pressure connected to the other chamber; and reinforcing plate mounted on the cen .tral portion ,ofthe diaphragm; said plate being adapted to seat over said outlet open- Ving.

.i 13. A calking device consisting of two hollow sections; a flexible diaphragmclamped between `said sections; an outlet nozzle for one ofthe sections; an air supply conduit connected to the other section;.and a pair of parallel concave '.nietal plates centrally clamped to opposite faces of the diaphragm inposition to seat overthe outlet opening when the diaphragm has been moved toward the same by the action of airunderfpressure.

14. A calliing device comprising two hol- -low sections; a flexible diaphragm Vclamped between said sections; one of` said sections deliverypipe associated vwith said outlet opening' andl having a flared outer end portion; and av reinforcing plate mounted on `said diaphragm, said plate being adapted ,pi'ojectingfiange;, and a rigid reinforcing device for the diaphragm so positioned as to prevent the same being `forced into said outlet opening by the action of air under pressure.

1G. In afcalking device, the combination of a pair of hemisphericalsections detachably connected together' on an equatorial line and forming a hollow casing7 an inlet for fluid under pressure connected to one of said sections, a discharge nozzle connected to the 'other section, a flexible diaphragm of concavo-convex form disposed .within the chamber formed by said sections and confined between the latter with its greatest area nor" mally out of Contact -withthe walls of said casing, and means for controlling the flow of fluid pressure to the chamber defined by the wallof one section and saiddiaphragm for causingthe latter to act upon and expel material through the nozzle carried by the other section.

17. In a calking device, the combination offa easing-comprising a pair of heinispheri- I cal sections ofwsubsfantially the saine size `detachablyv connected together, an outlet passage carried by one of said sections, an inlet for iuid under pressure carried by the other section, a discharge nozzle secured in said outlet passage, a reinforced lexible diaphragm of concave-convex form disposed within the` chamber of said casing and confined bet-Ween the sections o the same; said diaphragm dividing said chamber into tWo compartments and being limited in such area as to have a normal position clear of the Walls of the chamber, and means for controllingthe flow of .fluid pressure into one of 1o Said compartments to act upon said diaphragm and cause the latter to expel ma- In Witness whereof I have signed this 15 specification.

HOWARD ASHLEY PEDRIGK. 

